Panasonic UF-580 Service Manual page 220

Over Current Limiter (O.C.L)
The +24 VDC output is limited by Ton MAX Limiter (ON time period of transistor Q100) which is part of
the control circuit. The +5 VP, -5 VDC and +5 VDC outputs have over current limiters provided inside the
voltage regulator.
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